Richard will play the lead role of John Porter, a rogue military intelligence soldier in the series, which is based on the real life of the show’s writer, Chris Ryan.
Richard told the Press Association, “I think there’s always a pressure, especially when it’s written by one of the guys that was there, that did it.
“It’s useful because I can go to the book in search of the truth and find the military character, but trying to recreate that for his eyes is always going to be difficult…
“And knowing that there are a lot of Army guys out there that may watch this, you’ve always got that in your head.
“But we were working with SAS operatives who were consultants, monitoring what we were doing, making sure it was truthful, even though we’re making fiction, there still has to be an element of realism to it.
“But at the same time, you’re sometimes asked to do something because it loks good for camera, but we were all over it.”
However, he added that he’d loved filming for the show. He said, “It was thrilling. It meant I was there for the whole 20 weeks, pretty much, working every day.
“But it was really interesting to see the different situations that they were putting John Porter into.”
Strike Back, which has been specially adapted for TV from Chris Ryan’s hugely successful novel, will air on Sky1 HD in May.